Reinforced insulator pin



March 28, 1944. E. A. MACK 2,345,404

REINFORCED INSULATOR PIN Filed Aug. 11, 1942 2 Sheets-Sheet 1 INVENTOR.

Edward 4. ad?

March 28, 1944. E A. MACK REINFORCED INSULATOR FIN Filed Aug. 11, 1942 2Sheets-Sheet INVENTOR. L a/Way Q. 7%

Patented Mar. 28, 1944 REINFORCED INSULATOBPIN Edward A. Mack,Huntington, W. Va., assignor to-liver Iron and Steel Corporation,Allegheny County, Pa., acorporation of Pennsylvania Application August11, 1942, Serial'No. 454,383

6 Claims.

This invention relates to insulator-mounting assemblies of the typeincluding a pin mounted upon a cross arm and projecting upwardlytoreceive an internally socketed insulator for carrying electricalconductor wires.

One object of the invention :is to provide a novel form of bracing foran insulator pin to enable such a pin adequately to resist the stressesimposed upon it in service by a conductor that is carried by aninsulator mountedon the pin.

Another object is the provision of an assembly wherein the pin andbracing are in a novel 'way integrated into a unitary structure that isarranged to provide adequate bracing for the pin, and that is capable ofsimple :and inexpensive manufacture, and facilitated serviceinstallation.

In the accompanyingdrawings.

Fig. I is a side elevation .of my novel integrated assembly of insulatorpin and .the positioning and bracing structure therefor, showingtheassembly on the cross arm ofapole.

Fig. II is a view showing theinsulator pin gpositioning and bracingstructure in plan and the insulator pin integrated therewith in crosssection.

Fi III is a. similar view of the insulator positioning and bracingstructure, butomittingthe insulator pin and the -means for integratingit with thesaid structure.

Fig. IV is a side elevation of the insulatorpin positioning and bracingstructure, omitting the insulator pin and the means integrating it withthe positioning and bracing structure.

Fig. V is a front elevation of the structure shown in Fig. IV.

Describing the drawings in detail, the numeral 1 indicates a cross armof standard type in poleline use. The bracing for the insulator pin,such a pin being designated by reference numeral 2, is a generallytriangular frame. The frame has a bottom arm 3 in the form of a baseplate containing a centrally positioned pin-receiving hole 4, and sidearms 5 and 6 that extend convergently upward from the bottom arm orplate 3. In order that arms 5 and 6 embracingly may engage insulator pin2 projected through the pin hole 4, they extend convergently upward andinward to points sufficiently close to provide engagement upon oppositesides of the pin.

The uppermost portion of arms 5 and 6 and the flanges 5a and 6a extendedupwardly from the upper margins of the arms are transversely formed toconform to the surface configuration of the pin and to provide apin-receiving socket space 1 between them. The base 3 of the positioningand bracing structure is upwardly bowed transversely of the :basebetween the edges .31; and -32) of the base.

The pin positioning ,and bracing structure is composed of a single piecepf material,, desir,ably mild steel, punched and pressed to its desiredform. When the insulator pin is integrated with its positioning andbracing structure in suitable manner such as that shown in the.drawingaand to be described, the assembly -is therefore .one ofextremesimplicityand sturdiness.

In making the integrated assembly shown in the drawings, the insulatorpin .2 is ,passed through hole 4 in the base of the positioningandbracing structure, and through the socket Ibetween flanges 5a and ,6a.of the arms 5 and .6. Welds 8 and Bare then made, firmlyto integratethe insulator pin in the assembly. In .the weld 8, the opposed edges 10bordering the ,pin-receiving socket 1 provide anchorage .for ,the weldmetal which lies in the gaps H between them, and integrates theinsulator pin ,with its ,positioning and bracing structure .at ,twopoints circumferentially .of the pin. The weld .in both peripherallyspaced regions of the insulator .pin being elongate axially of the ,pinand serving to bond together the two flanges :5a and -6a .of the sidearms as well as to bond the insulator pin to the flanges, theintegration ,may beemade .with great facility and effectiveness. -W,el d.--9 integrates theinsulator pin 2--with the base 3 .of the positioningand bracingstructure andtthe edges of the hole 3 through which .the pin,extends. This weld 9, by firmly engaging the structure relieves theweld 8 of forces tending to break it which might result were the pin toremain loose in the hole 4, and supplements the weld 8 in preventingaxial shifting of the pin. The welded integration of the triangularpositioning and bracing structure at both its base and its apex with theinsulator pin, also causes the pin itself to reinforce that structureagainst distortion from its triangular form.

Insulator pin 2 extends upwardly beyond flanges 5a and 6a of thpositioning and bracing structure, and in its upward extension may carryinsulator-engaging means such as the threaded lead thimble l2 shown inFig. I. In its extension l3 downwardly beyond base 3 insulator pin 2 isthreaded, and may as shown carry a washer I 4 and nut I5 for clampingengagement of the assembly with the cross arm I of a pole.

The assembly may be mounted on the cross arm I, as indicated in Fig. I,so that insulator and the cross arm is clamped between washer and nut 14and IS on the pin shank and the base 3 of the frame structure. Inmounting the assembly, the upwardly bowed contour of its base 3 permitsthe bracing structure to find a seat on the cross arm at the edges 3aand 3b on the opposite ends of the base, so that the assembly seatsfirmly in spite of irregularities in the surface of the cross arm. Whenso mounted the assembly resists turning movement of the insulator pin inall directions under the pull of a conductor wire passed around orattached to an insulator carried by the pin, because the triangularstructure, or bracing element embracingly engages the insulator pinaround the periphery of the pin, and because the integrated assemblybears by means of a base of relatively great area against th structureon which the assembly is mounted. Looseness of the insulator pin in thehole through the cross arm is thus wholly compensated. Also thetriangular arrangement of the bracing frame and its welded integrationgives an integrated structure of strength adequat to sustain severestresses. The assembly, because of its bracing, has particularly greatutility in locations in which a conductor wire is carried around acorner, so that the conductor wire pulls on the insulator pin from tworelatively angular directions.

Substantial advantages of the described assembly thus derive both fromthe form of the bracing element and from its welded integration with theinsulator pin. The advantages of strength and firm mounting have beendescribed. Other advantages are to be found in its simplicity, in theease "with which it is manufactured, and in the fact that it issusceptible of complete factory fabrication ready for mounting andservice. As will have been seen, the assembly may be quickly and easilymounted in th field.

It is to be understood that the physical embodiment of my inventionherein shown and described is susceptible of modification in variousparticulars without departing from the principles of the invention, andthe scope of my invention is therefore to be restricted only bylimitations contained in the claims appended hereto.

I claim as my invention:

1. An integrated insulator pin assembly including an insulator pin, aone-piece bracing element having a pin-embracing base and arms extendedconvergently upward from said base and shaped adjacent their upper endscooperatively to form a pin-receiving socket space approximatelysurrounding the insulator pin, and means integrating the said insulatorpin with said bracing element.

2. An integrated insulator pin assembly including an insulator pin, abracing element having a pin-embracing base and arms extendedconvergently upward fromsaid base cooperatively to form adjacent theirupper ends a pinreceiving socket space, and means rigidlyinterconnecting the insulator pin with the said bracing structure at thepin-embracing base and at the pin-receiving socket thereof.

3. An integrated insulator pin assembly including a metallic insulatorpin, a metallic bracing element having a pin-embracing base and armsextended convergently upward from said base and shaped adjacent theirupper ends cooperatively to form a pin-receiving structure approximatelysurrounding the insulator pin, and bonding metal integrating the saidinsulator pin with both arms of the said bracing element at thepin-receiving structure formed thereby.

4. An integrated insulator pin assembly including a metallic insulatorpin, a metallic bracing element having a pin-embracing base and armsextended convergently upward from said base cooperatively to formadjacent their upper ends a pin-receiving structure, bonding metalintegrating the said insulator pin with both arms of the said bracingelement at the pin-receiving structure formed thereby, and bonding metalin tegrating the insulator pin with the pin-embracing base of thebracing element.

5. A triangular bracing element for an insulator pin including a baseplate perforate to embrace an insulator pin passed therethrough, armsextended convergently upward from said base, and extensions on said armsadjacent the upper ends thereof arranged to present opposed surfacesproviding a pin-receiving socket approximately in line with theperforation in the base of the bracing element. I

6. A triangular bracing element for an insulator pin including as aone-piece structure a pin-embracing base, arms extended convergentlyupward from said base, and flanges formed from the structure of saidarms and extended axially of the bracing element to provide opposedextended surfaces forming a pin-receiving socket.

EDWARD A. MACK.

